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정효빈,박효미,주기남 한국정밀공학회 2022 한국정밀공학회지 Vol.39 No.4
In this investigation, we propose a simple and effective lateral shearing interferometer based on a polarization grating. In the lateral shearing device, an incident beam is split into two beams by a polarization grating, and the returning beams can be laterally shifted after reflecting off a flat mirror and passing through the polarization grating again. These two beams are not only laterally shifted, but also their polarization states are orthogonal to each other as circular polarizations. With a single image obtained by a pixelated polarization CMOS camera, the proposed LSI can obtain the phase map corresponding to the x-sheared interferogram, and the other phase map can be calculated from another single image obtained by 90° rotation of the shearing device. Then, the original wavefront corresponding to the surface figure of the specimen can be reconstructed by wavefront reconstruction algorithms. In the experiments, various wavefronts generated by concave mirrors and a deformable mirror were measured and compared with those of a commercial Shack-Hartmann sensor.
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폐쇄성수면무호흡 환자에서 폐쇄부위에 따른 코골이 소리 분석
정효빈,최지민,정용수,홍석찬,김진국,조재훈 대한이비인후과학회 2012 대한이비인후과학회지 두경부외과학 Vol.55 No.8
Background and Objectives The detection of obstruction site is very important for the surgical treatment of obstructive sleep apnea (OSA). Among the various diagnostic modalities for detection that have been tried, an analysis of snoring sound could be a simple and safe alternative. This study evaluates the usefulness of sound analysis in OSA as a detection tool of obstruction site. Subjects and Method Fifteen patients who had been enrolled for the suspicion of OSA were studied. They were examined by videofluoroscopy and polysomnography to evaluate the obstruction site. During videofluoroscopy, snoring sound was recorded simultaneously. The snoring sound was analyzed by using Matlab program and its sonic characteristics were evaluated on the basis of the results in polysomnography and videofluoroscopy. Results According to the videofluoroscopy, 5 out of 15 patients showed narrowness only in the soft palate, while the rest of the 10 patients showed narrowness both in the soft palate and tongue base. Most of the snoring sound from the soft palate was of a low tone, under 1000 Hz, while the snoring sound from both soft palate and tongue base showed a high tone band, over 1000 Hz frequently and hump around 10 kHz. There was no specific correlation between apnea-hypopnea index and sonic characteristic. Conclusion The analysis of snoring sound may be a useful tool for detecting the obstruction site in OSA.
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계획행동이론 모형에 의한 COVID-19 팬데믹 전후의 생활체육 참여 행동 비교
정효빈,채재성 한국스포츠학회 2022 한국스포츠학회지 Vol.20 No.2
본 연구의 목적은 계획행동이론을 적용하여 여성 간호사의 생활체육참여에 대한 태도, 주관적 규범, 지각된 통제의 관계를 코로나19 전·후로 비교하여 검증하는 것이다. 연구대상은 서울과 경기도 지역에서 근무하는 여성 간호사 282명을 대상으로 하였다. 도출된 연구결과는 다음과 같다. 첫째, 코로나19 이전에 여성 간호사의 생활체육참여에 대한 태도는 생활체육참여 의도에 유의한 영향을 미치는 것으로 나타났다. 둘째, 코로나19 이전에 여성 간호사의 생활체육참여에 대한 주관적 규범은 생활체육참여 의도에 유의한 영향을 미치는 것으로 나타났다. 셋째, 코로나19 이전에 여성 간호사의 생활체육참여 의도는 생활체육참여 행동에 유의한 영향을 미치는 것으로 나타났다. 넷째, 코로나19 이후에 여성 간호사의 생활체육참여에 대한 태도는 생활체육참여 의도에 유의한 영향을 미치는 것으로 나타났다. 다섯째, 코로나19 이후에 여성 간호사의 생활체육참여에 대한 주관적 규범은 생활체육참여 의도에 유의한 영향을 미치는 것으로 나타났다. 여섯째, 코로나19 이후에 여성 간호사의 생활체육참여에 대한 인지된 통제(거리, 시간, 가격)는 생활체육참여 행동에 유의한 영향을 미치는 것으로 나타났다. 마지막으로, 코로나19 이후에 여성 간호사의 생활체육참여 의도는 생활체육참여 행동에 유의한 영향을 미치는 것으로 나타났다. The purpose of this study is to examine the attitude, subjective norms, perceived control of nurses' participation in sports for all by applying Ajzen's theory of planned behavior, and determine which factors affect the intention and behavior of participation in sports for all, focusing on the comparison before and after COVID-19. The subjects of the study were 282 female nurses working in Seoul and Gyeonggi-do. The results are as follows. First, the attitude of female nurses to participate in sports for all had a significant effect on the intention to participate in sports for all before COVID-19. Second, the subjective norms for female nurses' participation in sports for all before COVID-19 had a significant effect on the intention to participate in sports for all. Third, the intention of female nurses to participate in sports before COVID-19 had a significant effect on the behavior of participating in sports for all. Fourth, after COVID-19, the attitude of female nurses toward participation in sports for all had a significant effect on the intention to participate in sports for all. Fifth, the subjective norms for female nurses' participation in sports for all after COVID-19 had a significant effect on the intention to participate in sports for all. Sixth, after COVID-19, perceived control (distance, time, and price) of female nurses' participation in sports for all has a significant effect on sports participation behavior. Finally, after COVID-19, the intention of female nurses to participate in sports for all has a significant effect on the participation in sports for all.
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정효빈,차장우,박선영,윤인성,이정석,허민수,김진수 한국수산과학회 2019 한국수산과학회지 Vol.52 No.4
We investigated the sanitary characteristics of Alaska pollock Theragra chalcogramma roe as a raw material based on the standards of several countries. The standards for raw materials of Alaska pollock roe for lead, total mercury, 134Cs+137Cs, and 131I were those of the South Korean Ministry of Food and Drug Safety; Staphylococcus aureus, Salmonella spp., Clostridium botulinum, methyl mercury, 134Cs+137Cs, 131I, 239Pu, and 90Sr were those of the United States Food and Drug Administration; lead, methyl mercury, inorganic arsenic, chrome, 134Cs+137Cs, and 131I were those of the Ministry of Agriculture of China; nitrite ion, 134Cs+137Cs, 239Pu, and 235U were those of the Ministry of Health, Labor and Welfare of Japan; 134Cs+137Cs, 131I, 239Pu, and 90Sr were those of Codex; and 134Cs+137Cs, 131I, 239Pu, 241Am, and 90Sr were those of the European Food Safety Authority. The results for the global standard items other than C. botulinum (lead, total mercury, methyl mercury, inorganic arsenic, chrome, 134Cs+137Cs, and 131I, S. aureus, and Salmonella spp.) suggest that Alaska pollock roe is safe for use as a raw material.
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